Signal-Triggered Digital Amplifier Switching for Lower Idle Power
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Solution Overview
Problem
Digital power amplifiers consume power even when no signal is input, leading to unnecessary power loss due to switching operations.
Innovation Solution
A digital amplifier design that includes a switching unit, a driving unit, an input signal detection unit, and a control unit to initiate and stop switching operations only when a signal is present, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If switching operations are performed continuously in a digital power amplifier, then signal amplification is maintained, but power consumption increases unnecessarily when no signal is input
Solution Approach 1:
The patent applies dynamics by making the switching operation state changeable based on input signal presence. The amplifier dynamically transitions between switching operation and non-switching operation states, allowing the system to adapt its power consumption characteristics according to actual signal conditions while maintaining amplification capability when needed
Solution Approach 2:
The amplifier performs self-service by automatically detecting the presence or absence of input signals and autonomously controlling whether to perform switching operations. The input signal detection unit and control unit work together to enable the system to self-regulate its operation state without external intervention, reducing power consumption during idle periods
2Loss of energy
If switching operations are stopped when no signal is input, then power consumption is reduced, but the system must quickly resume switching when a signal appears
Solution Approach 1:
The patent applies preliminary action by maintaining the circuit in a ready state with detection and control units continuously monitoring for input signals. Even when switching operations are stopped to save power, the detection unit remains active to immediately sense signal presence and trigger resumption of switching operations, ensuring rapid response without continuous full-power operation
Data Source
AI summary
A digital amplifier includes a switch, a driving unit, an input signal detector, a control unit and a delay unit. The switch amplifies a signal input to the digital amplifier. The driving unit turns the switch on and off. The input signal detector detects whether an input signal is input to the digital amplifier. The control unit controls the switch to start switching when a signal is input to the digital amplifier and detected. The control unit controls the switch to stop the switching operation by stopping the driving of the driving unit, when the signal is not input to the digital amplifier and not detected. The delay unit delays an input signal to the digital amplifier by a predetermined time until the switching is started, so as to be transmitted to the switch. The switch amplifies the input signal sent to the digital amplifier via the delay unit.